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So the saga continues. Original plumber has been back out and the pressure in the EV has been adjusted a couple of times and we’re now at 2.6bar. Still got the issue. After more investigating from me, it seems that it only makes this noise when the hot water tap for the bath is turned on after...

Thanks for the replies. Yes this usually happens when it has been left a while, such as overnight. Not sure if hot water pipe is connected to EV, attached a pic for reference. So in conclusion the pressure likely needs adjusting on the EV? I’m guessing this isn’t dangerous at the moment until I...

Hi No it was changed because we had dripping through the tundish - we’ve had the prv, combination valve and EV changed as the plumber wasn’t sure what was causing it. It’s a Range Tribune HE cylinder, I’ve attached the specs if that’s what you mean by volumes? Sorry, I’m a bit green on this...

Hi Sard Did you get to the bottom of this? Were in the same position - new EV, loud foghorn noise for 5-10 secs when hot water tap turned on. Thanks